Name of the Vulnerable Software and Affected Versions Linux Kernel versions prior to v5.4.156

Description A use-after-free (UAF) issue exists in the j1939 netdev start() function, specifically affecting the rx kref of j1939 priv. The actual impact and attack plausibility have not yet been proven.

Recommendations For Linux Kernel versions prior to v5.4.156, update to version v5.4.156 or later to resolve the issue. As a temporary workaround, consider restricting access to the j1939 netdev start() function until a patch is available.